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US 5,705,144 AGranted
Cosmetic composition containing retinol and dioic acid
AssigneeUnilever Patent Holdings B.V.
InventorsClive Roderick Harding, Caroline Marian Lee, Ian Richard Scott
Life of this patent
Estimating the term…
Abstract
A composition for topical application to human skin in order to promote the repair of photo-damaged skin and/or to reduce or prevent the damaging effects of ultra-violet light on skin and/or to lighten the skin comprising retinol or a derivative thereof and a dioic acid.
Claims9
A composition suitable for topical application to human skin in order to promote skin lightening, repair of photo-damaged skin and to reduce or prevent the damaging effects of ultra-violet light on skin, which composition comprises a synergistically effective mixture of:
- i) an effective amount of from 0.01 to 10% by weight of retinol or a derivative thereof having the structure (1):
- ##STR6## where X represents H or --COR.sup.1 R.sup.1 represents a group chosen from branched or unbranched, alkyl or alkenyl groups having an average of from 1 to 20 carbon atoms;
- and
- ii) an effective amount of from 0.1 to 30% by weight of a dioic acid having the general structure (2)
- COOH--(C.sub.a H.sub.b)--COOH (2)
- where a is an integer of from 6 to 20 and b is an integer of from 8 to 40.
3 more elements
Dependencies are inferred from the claim text.